/ Dictionary / Index S sea dahlia: Meaning and Definition of Find definitions for: sea' dahl"ia Pronunciation: [key] a garden plant, Coreopsis maritima, of the southwestern coast of North America, having long-stalked, solitary, yellow flower heads nearly 3 in. (7.6 cm) wide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sea cucumber Sea Dayak Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language